Parts for your 2019 Subaru Impreza-Wheel studs nuts

2019 Subaru Impreza wheel studs and nuts: purpose, care, and when to replace

Based on technical references including the 2019 Subaru Impreza Owner’s Manual (flat tyre/wheel changing instructions with torque specification) and the Subaru Service Manual (Wheel & Tyre/Hub sections showing press‑in studs and separate nuts), this model uses wheel studs and nuts rather than wheel bolts. Factory specification is a 5×100 pattern with M12×1.25 wheel studs and matching conical-seat wheel nuts.

On the 2019 Subaru Impreza, the wheel studs and nuts do the heavy lifting of clamping the wheel securely to the hub. The studs are pressed into the hub from behind, the nuts thread onto those studs to generate clamping force. Get the clamping right and the wheel runs true, the brakes behave, and tyres wear evenly. Get it wrong and you can end up with shudders, warped rotors, or—worst case—loose wheels.

For servicing, the aim is clean threads, correct hardware, and accurate torque. Subaru specifies tightening the wheel nuts to 120 N·m on clean, dry threads. Avoid lubricants or anti‑seize on the studs, because that alters friction and can over‑stretch the studs at the same torque. When refitting a wheel, run the nuts on by hand first (to avoid cross‑threading), then torque in a star pattern. After any wheel-off job—tyres, brakes, rotations—re‑check torque after 50–100 km.

Signs a stud or nut needs replacing include damaged or flattened threads, a nut that won’t hold torque, visible stretch or bending, rust pitting on the thread flanks, or a stud that spins in the hub. If a nut feels gritty or binds before it seats, stop—forcing it can gall the threads and weaken the clamping.

Replacing a damaged stud is straightforward workshop fare: remove the wheel and brake rotor, press or drive the old stud out from the back of the hub, then pull the new stud into place squarely using a spacer and a sacrificial nut, finishing with a torque check on the wheel once reassembled. Always match thread size (M12×1.25) and seat type (60‑degree cone for OE wheels), and replace any suspect nuts as a set to keep clamp loads even.

• Torque wheel nuts to 120 N·m, dry, star pattern
• Hand‑start every nut, never rattle them on
• Re‑torque after 50–100 km post‑service
• Do not lubricate studs or nuts unless a Subaru procedure specifically calls for it

Popular questions about 2019 Subaru Impreza wheel studs and nuts

What’s the correct torque for the wheel nuts?
The factory torque for the 2019 Impreza wheel nuts is 120 N·m on clean, dry threads. Use a star pattern and re‑check torque after 50–100 km to account for any bedding of the wheel and hardware.

What thread size and seat type does it use?
The 2019 Impreza runs M12×1.25 studs with 60‑degree conical‑seat nuts for OE wheels. If fitting aftermarket wheels, confirm the seat style matches the nuts to avoid fretting and loss of clamp.

Should anti‑seize be used on wheel studs?
No. Subaru’s torque spec assumes dry threads. Lubricants or anti‑seize can alter friction and lead to over‑torque and stretched studs. Keep threads clean and dry, replace any damaged hardware, and torque accurately.